% antenna azimuth beamwidth in radiansthetaE=thetaE_deg*pi/180.;% antenna elevation beamwidth in radiansre=6371000;% earth radius in meterrh=sqrt(8.0*hr*re/3.);% range to horizon in metersSLv=10.0^(SL/10);% radar rms sidelobes in voltssigma0v=10.0^(sigma0/10);% clutter backscatter...
使用MATLAB程序“figl_27.m”再现此图。如第1.10节的清单1.12所示。 % Use this program to reproduce Fig. 1.27 of text.closeallclearallnp=7;pt=165.8e3;% peak power in Wattsfreq=3e+9;% radar operating frequency in Hzg=34.5139;% antenna gain in dBsigmam=0.5;% missile RCS m squaredsigmaa=4...
rpm = 12.5; scanrate = rpm*360/60;% deg/sbeamw = 1;% beamwidthupdaterate = scanrate/beamw;% update at each beamradarht = 15.0;% radar height Create aphased.CustomAntennaElementobject that acts as a transmit antenna element and a receive antenna element in theradarTransceiverobject. ...
which generates clutter inside the footprint of the mainlobe of the radar antenna. This is only possible when the radar being used has a well-defined beam with azimuth and elevation two-sided beamwidths less than 180 degrees. For theradarDataGenerator...
altimeterAntennaElement = phased.GaussianAntennaElement("Beamwidth",antBeamwidth,"FrequencyRange",frequencyRange);% Plot the beamwidth to verify that it matches the expected antenna beamwidthbeamwidth(altimeterAntennaElement,fCenter); The transmit and receive antennas are modeled as aphased.Radiatorandphased...
Real Antenna Beamwidth and Gain Use the ap2beamwidth function to calculate the real antenna beamwidth. Get realAntBeamwidth = ap2beamwidth([daz del],lambda) % [Az El] (deg) realAntBeamwidth = 2×1 0.6006 2.8391 Use the aperture2gain function to calculate the antenna gain. Get antGain...
Define a sinc-function antenna pattern with a half-power beamwidth of 90 degrees. The radar transmits at 100 MHz. Get pat_angles = linspace(-90,90,361)'; freq = 100e6; ntn = phased.SincAntennaElement('Beamwidth',90); pat = ntn(freq,pat_angles'); Specify a free-space range of ...
beamformingAngles = fovStart+beamwidth/2:beamwidth/2:fovStop-beamwidth/2; The response of the virtual array steered to these beamforming angles shows that these angles will give us good coverage of the FOV. Get ax = axes(figure); hold(ax,"on")foriAng = 1:length(beamformingAngles) ...
Lei Du, Qiao Sun, Changqing Cai, Yue Zhang, and Hongbo Hu, "Antenna Beamwidths of Above-The-Road Radar for Traffic Speed Enforcement in China," International Journal of Antennas and Propagation, vol. 2012, Article ID 492326, 9 pages, 2012....
I made 1 degree beamwidth of 32dbi gain using 20 by 20 array. I couldn't understand radar scan URA example regarding the rotation of antenna. It states that rotational movement is not supported but howcome antenna scanned from -45 to 45? Any help...